The Dometic 36165 Furnace Air Flow Sail Switch is designed for use with Atwood / Dometic furnaces. The sail switch is an air-proving, safety device that will not allow ignition to occur until it sees 75% of the motor's rpm. It ensures that the combustion wheel is rotating fast enough so there is a proper air and gas mixture for smooth ignition.• Flat blade-style• Replaces Dometic 33082• Paddle Size: 2" x 1/2"• Rated 0.1A @ 30V DCCompatibilityDometic Atwood Furnace AFM Series with Serial Numbers AFTER 72489156: AFMD25111, AFMD25121, AFMD25131, AFMD25141, AFMD25151, AFMD30111, AFMD30121, AFMD30131, AFMD30141, AFMD30151, AFMD35111, AFMD35121, AFMD35131, AFMD35141, AFMD35151Dometic Atwood Furnace AFLD Series with Serial Numbers AFTER 72991127: AFLD35111, AFLD35121, AFLD35131, AFLD40111, AFLD40121, AFLD40131Dometic Atwood Furnace AFLA Series with Serial Numbers AFTER 81689155: AFLA35211, AFLA35221, AFLA35231, AFLA40211, AFLA40221, AFLA40231Dometic Atwood Furnace DFMD Series with Serial Numbers AFTER 72489156: DFMD25111, DFMD25121, DFMD25131, DFMD25141, DFMD25151, DFMD30111, DFMD30121, DFMD30131, DFMD30141, DFMD30151, DFMD35111, DFMD35121, DFMD35131, DFMD35141, DFMD35151 Ensures there is proper air & gas mixture for smooth ignition Replaces Dometic 33082 Rated 0.1A @ 30V DC | Dometic 36165 Furnace Air Flow Sail Switch with Bracket Upgrade Kit